焊缝跟踪一直是焊接自动化研究的主题之一，在工程机械制造中，钢结构占有相当大的比例，由于材料、结构形式、厚度、焊接方法的不同，都给焊接带来困难。FWT型自动化焊接系列台车是一种低成本、自动化角焊缝跟踪器，用于重、厚、长大件或轻、薄、短小件的焊接，可以平焊、横焊 Welding seam tracking has always been one of the major topics in the research of welding automation. In the construction machinery manufacturing, the steel structure occupies a large proportion and due to the differences in material, structure, thickness and welding method, welding is difficult. FWT automatic welding series trolley is a low-cost, automated fillet weld tracker for heavy, thick, long or light, thin, short pieces of welding, welding can be horizontal, horizontal welding